With summer fast approaching Shadi Ammouri, director of product marketing, KILZ offers advise on selecting the right exterior primer. Benefits of Primer: The purpose of primer is to better prepare a surface for painting. By first laying a primer foundation, you will almost certainly  improve the finish and durability of any paint job. Priming also helps solve a wide range of problems including blocking stains, sealing unwanted odors and minimizing differences due to uneven porosity, sheen an...